Behold an $8,000 Star Wars poster, and a wacky one at that. This rare 1978 promotional poster for a Star Wars concert featuring R2-D2 and C-3PO rocking out is going up for auction, where the item has been priced between $5,000-$8,000. This piece of zany pop art — which was designed by the poster legend John Alvin and signed by George Lucas — is going to hit the auction block on July 26 at the Heritage Vintage Movie Posters Signature Auction in Beverly Hills.